haha, that's badass!! The whole thing is quite epic, and that pose is somethin' else for the content being portrayed :)

Something that really stands out to me though, is how two-dimensional it all feels. Like everything has such gorgeous shading and attention to detail, but there is hardly any depth to it.

A lot of this has to do with how everything is shaded in the same way with the same amount of contrast and value no matter the content or position. For example, it's not hard for the eyes to believe that his right hand, face, and stomach all occupy the same plane on the z axis.

Beyond that, the individual pieces are not conveyed in a 3-dimensional way; the fish creature arms, Cthulu's wings, the tentacles, the fingers, the waves.. they all look like they were laid flat on the canvas. Nothing in particular appears to have depth on its own. The pointing finger is probably the easiest example. As a stand alone image the viewer would have no idea that it was coming towards them because of the way it is shaded and drawn. Only because of the context that goes with it is it possible to see it with any depth.

Overall this piece is awesome and worthy of the 1st place it will probably get, but because it was getting such praise I thought I'd point out this relatively evident oversight. If perspective isn't a concern for you I wouldn't worry too much about it. If it has been something on your mind, though, I would put some time into studying it and applying it in your works. You've got a great style, and definitely skill, but I think that there is a lot more potential yet to be released.

Holy crap! This must have taken some time. You've really captured a great feel. Love the colors, the water. Even the frame is great. I wish I could keep my motivation going for something this large and detailed. Excellent job!

\o/ Really cool! If I had to nitpick (and I do don't I?) ... I think a stronger glare from the lightning on the head, hand & arm would look even better and increase the dramatic effect. And shouldn't the wings be seen in the side frames as well (or perhaps they are smaller than I think and a hint can be seen?)